#!/bin/sh

# Slackware build script for jfsw

# Written by B. Watson (yalhcru@gmail.com)
# Updated for Slackware 14.2 with the help of orbea <ovariegata@yahoo.com>

# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.

# 20180710 bkw: BUILD=2
# - updated for 20180424_8fc2d54 (latest git).
# - finally fix long-standing segfault bug.
# - document new optional deps in README.
# - make slack-desc show runtime library deps.
# - remove freepats from REQUIRES. I've never been able to get
#   jfsw to play music using them anyway.
# - expand the section on the full-version sw.grp, move to
#   separate README_game_data.txt. Found out about Wanton Destruction,
#   it's now documented there too.
# - add README_music.txt, explaining how to get the music working.
#   turned out to be quite a lengthy project...
# - expand README a bit, mention gog.com free download.
# - allow fluidsynth builds to work even if fluidsynth built with JACK.
# - add SDL2=no and FLUID=no build options.

# When updating to the latest commit of jfsw, we gotta make sure we
# get the correct commits of the other 3 sources (jfaudiolib, jfbuild,
# jfmact). To do this:
#   git clone https://github.com/jonof/jfsw.git jfsw.tmp
#   cd jfsw.tmp
#   git submodule init
#   git submodule update
# Fortunately only the .info file needs to be updated. This script
# parses it instead of having the commit hashes hardcoded here too.
# VERSION is duplicated as usual, but here it only serves to name the
# package (you could build just fine with any VERSION so long as the
# .info file is correct).

PRGNAM=jfsw
VERSION=${VERSION:-20180424_8fc2d54}
BUILD=${BUILD:-2}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -e

# We got 4 source tarballs to extract, so create an enclosing $PRGNAM
# dir to put them all in (for ease of cleanup, if nothing else). When
# we're ready to build, the source will all be in $TMP/$PRGNAM/$PRGNAM.
rm -rf $PKG
rm -rf $TMP/$PRGNAM
mkdir -p $TMP/$PRGNAM $PKG $OUTPUT
cd $TMP/$PRGNAM

# 20180710 bkw: this is an unusual thing for a SlackBuild to do:
# parse its own .info file. Done this way to avoid duplicating
# all those full-length git hashes in both files.
if [ ! -e "$CWD/$PRGNAM.info" ]; then
  echo "$PRGNAM.info not found, where did it go?" 1>&2
  exit 1
fi

# For paranoia's sake, don't actually source the entire .info file, just
# grab the DOWNLOAD= assignment. This rather cryptic sed command means
# "start printing lines when you hit one that starts with DOWNLOAD,
# and exit when you hit one that ends with gz and a double-quote
# (plus possible trailing whitespace)". Result is the multi-line DOWNLOAD
# assigment only.
DLFRAG="$( mktemp ./tmp.info.XXXXXX )"
sed -n '/^DOWNLOAD/,$p;/gz" *$/q' < "$CWD/$PRGNAM.info" > $DLFRAG
source $DLFRAG

for URL in $DOWNLOAD; do
  SRCNAM="$( basename "$URL" .tar.gz )"
  PNAM=$(echo $SRCNAM | sed -e 's/-.*//')
  [ "$PNAM" = "$PRGNAM" ] || DIRS="$TMP/$PRGNAM/$PNAM $DIRS"
  rm -rf $SRCNAM $PNAM
  tar xvf $CWD/$SRCNAM.tar.gz
  mv $SRCNAM $PNAM
done

cd $PRGNAM
mv $DIRS .
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \+ -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \+

# 20180711 bkw: how to trigger a known segfault:
# <orbea> make a save game, load that save game, die while holding the
#         fire button
# I came up with a band-aid to work around the segfault. Stops the
# fire button from working the same as a Y keypress (or at all), in Y/N
# prompts. Patch was sent upstream: https://github.com/jonof/jfsw/issues/14
patch -p1 < $CWD/patches/fixsegfault.diff

# 20180712 bkw: one liner attempt to get SDL (1.2 only) CD-audio support
# working.  It turns out there's something worse wrong, I can't even get
# the example code from libsdl.org to play a CD (it'll list the tracks,
# but SDL_CDPlayTracks() doesn't work, the drive won't even spin up).
# Since this is SDL 1.2, not 2.x, any attempt to ask for help from an
# SDL developer or expert is going to be answered with "port your code to
# SDL 2.x!", so I'm just documenting CD support in jfsw as being broken.
#patch -p1 < $CWD/patches/sdl_cdrom_fix.diff

# 20180712 bkw: if fluidsynth happens to have been built with optional
# JACK support, it'll be the default driver and jfsw will try to use it.
# This doesn't actually work, so:
patch -p1 < $CWD/patches/dont_use_jack.diff

# 20180712 bkw: we have sdl.pc (not sdl1.pc) for SDL 1.2.x:
patch -p1 < $CWD/patches/sdl1_fix.diff

# 20180712 bkw: upstream doesn't provide a way to override autodetection
# of SDL2 and fluidsynth, so I do it with a couple of patches:
[ "${SDL2:-yes}" = "no" ] && patch -p1 < $CWD/patches/disable_sdl2.diff
[ "${FLUID:-yes}" = "no" ] && patch -p1 < $CWD/patches/disable_fluid.diff

# 20180711 bkw: The -Wno-return-type isn't needed for gcc but does no
# harm. Left in place in case someone wants to build this with clang
# (add a CC=clang arg to the make command, or 'export CC=clang').

# 20180711 bkw: JFAUDIOLIB_USE_SDLMIXER=1 doesn't work (build fail due
# to missing driver_sdlmixer.c). Maybe someday it'll work and then we
# hear the demo music without having to install fluidsynth?

# 20200416 bkw: fluidsynth 2.x works OK, but the version check in the
# source doesn't like its version number.
sed -i '/^#error.*Fluid/d' jfaudiolib/src/driver_fluidsynth.c

# 20200428 bkw: add Twin Dragon td.grp to the list of supported GRP
# files. Need this for the jfsw_twin_dragon build.
patch -p1 < $CWD/twin_dragon_grp.diff

make \
  RELEASE=1 \
  PREFIX=/usr/share/games/$PRGNAM \
  CFLAGS="$SLKCFLAGS -Wno-return-type" \
  CXXFLAGS="$SLKCFLAGS"

# Document what the binary package needs in its slack-desc.
BIN_NAME=sw
SDLVER=1.2
WITHFLUID=without
ldd $BIN_NAME | grep -q libSDL2 && SDLVER=2.0
ldd $BIN_NAME | grep -q libfluidsynth && WITHFLUID=with

# no 'make install' target
mkdir -p $PKG/usr/games
install -s -m0755 -oroot -groot $BIN_NAME $PKG/usr/games
ln -s $BIN_NAME $PKG/usr/games/$PRGNAM

# Data directory included in package, even though we don't include data file.
# Why? Because the user might be grabbing sw.grp from a retail CD-ROM, and
# if this dir doesn't exist, he might get confused...
mkdir -p $PKG/usr/share/games/$PRGNAM

# Icon taken from the highres pack, highres/screen/menu/2870.png
mkdir -p $PKG/usr/share/pixmaps
cat $CWD/$PRGNAM.png > $PKG/usr/share/pixmaps/$PRGNAM.png

mkdir -p $PKG/usr/share/applications
cat $CWD/$PRGNAM.desktop > $PKG/usr/share/applications/$PRGNAM.desktop

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a GNU.TXT readme.txt releasenotes.html $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
cat $CWD/README > $PKG/usr/doc/$PRGNAM-$VERSION/README_SBo.txt

mkdir -p $PKG/install
sed -e "s,@WITHFLUID@,$WITHFLUID," \
    -e "s,@SDLVER@,$SDLVER, " \
    $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
